Chief executive Richard Miller, who was based in London, quit after five years at Sentebale — a charity Harry co-founded with Prince Seeiso of Lesotho in 2006.
The Princess of York, 34, must now choose to either spend the holidays with the royal family at Sandringham or in Montecito, Calif., with the Duke and Duchess of Sussex.
The Duchess of Sussex, 43, has reportedly appointed herself as the CEO of her lifestyle brand after struggling to find a suitable candidate for the role.
The iconic 12th-century landmark opened its doors to French President Emmanuel Macron and his wife, First Lady Brigitte Macron, on Friday ahead of its official reopening next month.